Rtek RTEK 1.7 breaking up under load, NOT running lean.
#1
RTEK 1.7 breaking up under load, NOT running lean.
Need some input. Built a tii block, RA classic seals, solid corners, Race springs, big streetport, big exhaust ports etc.. basically, nicely built motor.
Specs:
Rtek 1.7
Rewired Walbro 255
550/750 injectors
Modified stock fuel rails
Adjustablr fpr
44psi base fuel pressure
Stock s5 turbo/ported wastegate
8psi max boost
No emissions
Stock 7/9 spark plugs
Stock coils
Cruising is fine, idle is fine, wot is fine under light load in 1st/2nd
Cruise AFR: ~14-15.5
Boost AFR: ~10.8-11.2
Now the issue is, when I go for a hard pull in any gear, it will break up, and seemingly detonate. Even when afr's are in the low 11's. Actually it will even break up in vacuum!!! I can NOT figure out wtf the problem is. Tried two different harnesses, And rechecked every ground. I also just installed a restrictor pill, and that didn't help either.
My car just breaks up under load, no idea why. Afr is fine, and actually quite rich. What could I be over looking???
Specs:
Rtek 1.7
Rewired Walbro 255
550/750 injectors
Modified stock fuel rails
Adjustablr fpr
44psi base fuel pressure
Stock s5 turbo/ported wastegate
8psi max boost
No emissions
Stock 7/9 spark plugs
Stock coils
Cruising is fine, idle is fine, wot is fine under light load in 1st/2nd
Cruise AFR: ~14-15.5
Boost AFR: ~10.8-11.2
Now the issue is, when I go for a hard pull in any gear, it will break up, and seemingly detonate. Even when afr's are in the low 11's. Actually it will even break up in vacuum!!! I can NOT figure out wtf the problem is. Tried two different harnesses, And rechecked every ground. I also just installed a restrictor pill, and that didn't help either.
My car just breaks up under load, no idea why. Afr is fine, and actually quite rich. What could I be over looking???
#3
I'm suspecting a weak coil as well. Hopefully that is the issue. The car runs GREAT beside the break up, and the rtek makes me feel a lot safer than the stock ecu
I understand that I need full tuneability to pull all the power out of this motor, I'm simply running the rtek on low boost to get the car going, and driving while I save for a real upgrade. Whether it be a 2.1 or anything else.
#7
Drives fine now.
You could try all 9 plugs, and make sure your injectors are working correctly. I had an NA injector do exactly what you're experiencing at 5800 because it was bad.
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